public void Test_Lazy_Initialization()
{
Book book = bookDao.FindById(1);
Author author = authorDao.FindById(1);
// check if both obtained instances are proxies
Assert.IsTrue(book is BookProxy);
Assert.IsTrue(author is AuthorProxy);
// check if both proxies have uninitialized collections
BookProxy bookProxy = (BookProxy)book;
AuthorProxy authorProxy = (AuthorProxy)author;
Assert.IsFalse(bookProxy.AuthorsAreFetchedOrSet);
Assert.IsFalse(authorProxy.BooksAreFetchedOrSet);
// initialize collection of authors
Console.WriteLine();
foreach (Author a in book.Authors)
{
Console.WriteLine($"First Name: {a.FirstName}, LastName: {a.LastName}");
}
Console.WriteLine();
foreach (Book b in author.Books)
{
Console.WriteLine($"Id: {b.Id}, Title: {b.Title}");
}
Console.WriteLine();
// check if object inside collection is also proxy
var authors = new List <Author>(book.Authors);
var books = new List <Book>(author.Books);
Author a1 = authors[1];
Book b1 = books[0];
Assert.IsTrue(a1 is AuthorProxy);
Assert.IsTrue(b1 is BookProxy);
authorProxy = (AuthorProxy)a1;
bookProxy = (BookProxy)b1;
Assert.IsFalse(authorProxy.BooksAreFetchedOrSet);
Assert.IsFalse(bookProxy.AuthorsAreFetchedOrSet);
}
